Horse-power



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G. E. BURT.

HORSE POWER. 310.3819115 Patented Aug. 14, 1888.

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G. E. BURT.

HORSE Pow/BP..

No. 887,945. Patented Aug. 14, 1888.

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u. persas, vnmumwpw. wmmm. DA a UNITED STATES PATENT @Erica GEORGE E. BUR'I, OF HARVARD, MASSACHUSETTS.

HORSE-POWER SPECIFICATION forming part of Letters Patent No. 387,945, dated August 14, 1888.

Application filed Julvf, 1887. Serial No. 243,600. (No model.)

To @ZZ whom it may con/cern:

Be it known that I, GEORGE E. Buer, a citizen of the United States, residing at Harvard, in the county of "Worcester and State of Massachusetts, have invented a new and use ful, Improvement in Endless Chain Horse- ]owers, of which the following is a specification.

Heretofore endless-chain horse-powers have been so constructed that the truck-wheels had to reverse their motion in passing from the upper to the u nder track, and vice versa. They were also constructed with straight or single anglebolts to hold the treads, and a second bolt or projection and nut was required to hold the truck-wheels.

The object of my invention is to reduce the friction. to increase the power and durability without increasing the cost of the machine, and to construct and arrange the mechanism of endlesschain horse-powers so as to avoid the reversion of the truck-wheels; also to ntilize the tensile strength of tread bolt, to strengthen the axlesand conneoting-pivots and make it 'hold in position both treads and truck wheels to diminish the noise and conse-A quent wear caused by the reaction of the wheels, and utilize the power so expended. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a side elevation of the machine or device. Fig. 2 is a transverse vertical section through the center of the supporting truck-wheels, tread, and track, and showing,` the position of the wheels. Fig. 3 is a perspective view of one ofthe links of the chain. Figs. 4 and 5 are perspective views showing one of the links in different positions. Fig. 6 is a vertical central section of the axle of the set of wheels on one side the link, the parts being separated; Fig. 7, alike viewof the axle of the set of wheels on the other side and the link-connection. Fig. 8 is a perspective view of the angle-holt.

In the drawings, the main frame A A is constructed in a substantial manner, with upper and lower tracks, B and C, and central track, T. (See Fig. l.) The links of the endless chain L V are constructed with connect ing and pivot seats in a line with each other and on the same plane; but the supportingaxles E E'are attached to lhelinks, one above the otlier,alternalely,and ol sufficient distance apart to have the supportiiig-trucks D D rest against the upper and lower portion, Band C, ot' the outer track, (see Figs. lA and 2,) and the supportingtruck \V \V to rest against the tracloheam l, which is placed about centrally in a vertical line between them. The trucks XV and D should he placed a suflicient distance apart to allow each set to revolve in opposite directions; but each set rolls on its own track and does not frictiouize on the other track, and each set of trucks is arranged so as to be on a different horizontal plane, as shown in Fig. 2. The set of wheels W rest on the track T, the opposite set of wheels, D, rest on the track B, and the peripheries of both series of truck-wheels, being in contact with the several tracks, constitute a [irm support for the tread. The curved end portions, S S, of the outside track, B and C, are constructed with a suicient radins to connect the said portions and support the truck-wheels D in their passage from the one portion to the other. The Challilinks are constructed with cogs Z. and tubular axles E and Eand connections caston thelinks. The axles E of the wheels XV must be of suiiicientlength to form the pivot for the connecting-link V, and in the axles E ofthe wheel D the tubular part Z of the links Lare pivoted, as shown in Fig. 6. The axle E has a projection, x, on its upper side, which enters a suitable recess in the under side of the tread-lag H, and aidsinsecuring` firmness toit, the doubleanglebolt N passing through the links V and L and the axles, and each lag` is secured in position by nuts o and o at each end. If desired, the additional pieceY may be placed on each lag, so that the upper end of the bolt N can pass through, in which case the nut o will come above said piece. The lags H, which form the tread, are of the usual construction, and are recessed in the under side for the projection .e on the link. When the treads are placed in position and the nuts o turned down, the movenient of the parts when the machine is put in motion causes a vertical force to act on the links and tread. The nut o on the axle, being turned down, makes a horizontal force, and lags and links are grasped and bound ICO strongly together at right angles, and the truckwheels are held irmly in position.

Operation: When a horse is put into the machine and the platform endless chain is set in motion, the truck-wheels W W rest on the track T andrevolve in the usual manner; but the truck-wheels D D being pivoted above the pivoted connections of the links at such a distance as to have the Wheels D D come in contract with the upper and lower' portions, B and C, of the outer track, leaving an open space between the wheels D and track T, (see Fig. 2,) the wheels D will revolve in the opposite direction (see Figs. l and 2) and hold the platform endless chain rigid in its pivoted connections and hold the chain-links positively in gear. The wheels D D guide and. hold the endless-chain section on the curved tracks S S and support the entire moving platform on the lower track, C. If the horse should step on the platform between the wheels W IV directly over the wheel D, the wheels W WV, resting on the track T, would make a base for the weight to rest on. The pivoted joint in the platform could not be depressed, as the wheels D D on the opposite side of the machine and track B would hold the section rigidly in position. The double angle-bolt N does threefold duty. It holds the link, tread, and wheel in position vertically and horizontally, exerting double power to hold the wheels in an upright position, and is so arranged as to utilize and give its tensile strength to heretofore the weakest part of cast-iron links, making them equally as strong as wronght-iron links and retaining all the power usually lost in reversing the wheels, avoiding the friction and noise and making a stronger and easierrunning machine at less cost.

I do not claim, broadly, the use of single anglebolts in horse-power machines. That has been used with other combinations.

What I claim as new, and desire to secure by Letters Patent, is

l. In a horse-power, and in combination with the outer track having upper and lower portions, B C, and the track T between the same, the chain, the lags, and the Awheels pivoted to the ends of the lags on different horizontal` planes, substantially as described.

2. In a horse-power, the combination of the lags H, the links L andV, the wheelsWand D, the bolts N, and nuts o and o', substantially as described.

3. In a chain horsepower, the combination of the wheels, each set pivotally secured to the lags of the tread in different horizontal planes,

with the tracks having upper and lower portions, B and C, and the central track, T, between them, wherebyl one set of wheels moves its entire circuit on the outside track and the other moves its entire circuit in a different plane and on an inner track, substantially as other track, whereby reversion and frictioniz;V

ing of the wheels in passing from the upper to the lower part of the track are avoided.

6. In a horse-power, in combination with the wheels pivoted in different horizontal planes, the tracks arranged on different planes, the outer track adapted for the wheels pivoted in one plane and the inner track for those pivoted on another plane, whereby any reversion in the revolution of the wheels is prevented.

GEORGE E. BURT.

Witnesses:

E. E. BURT, C. E rBLooD. 

